UPJ Obstruction Treatment in Mumbai Ureteropelvic Junction (UPJ) obstruction is a condition in which urine cannot flow normally from the kidney into the ureter. Because the obstruction can develop gradually, some people may have few or no symptoms for a long time. When urine remains trapped within the kidney, it can cause hydronephrosis, recurrent infections, kidney stones and, in some cases, deterioration of kidney function. Timely evaluation is therefore important when imag